#include "stdafx.h" #include <stdio.h> #include <vector> #include <algorithm> using namespace std; void FindCount(vector<int> &vect,int iPos,int &Count) { if (iPos>8) { int i1 = vect[0] * 100 + vect[1] * 10 + vect[2]; int i2 = vect[3] * 100 + vect[4] * 10 + vect[5]; int i3 = vect[6] * 100 + vect[7] * 10 + vect[8]; if(i1+i2==i3) { printf("%d+%d==%d\n", i1, i2, i3); Count++; } return; } for (int i = 1; i <= 9;i++) { if ( find(vect.begin(),vect.end(),i) == vect.end()) { vect[iPos] = i; FindCount(vect, iPos + 1, Count); vect[iPos] = 0; } } } int _tmain(int argc, _TCHAR* argv[]) { vector<int> vt(9); int Count = 0; FindCount(vt, 0, Count); printf("一共%d个!", Count); system("pause"); return 0; }
顺便说说 vector中的find
一个find Vector的例子,注意find不属于vector的成员,而存在于算法中,应加上头文件#include <algorithm>:
#include <vector> #include <algorithm> #include <iostream> int main( ) { using namespace std; vector<int> L; L.push_back( 1 ); L.push_back( 2 ); L.push_back( 3 ); L.push_back( 4 ); L.push_back( 5 ); vector<int>::iterator result = find( L.begin( ), L.end( ), 3 ); //查找3 if ( result == L.end( ) ) //没找到 cout << "No" << endl; else //找到 cout << "Yes" << endl; }
用1到9这九个数字变成三位数加三位数等于三位数的加法,例如:173+295 =468,一共有多少种情况?
时间: 2024-12-25 18:31:39